This object sets how often the URL-based availability check runs for a specific port of this server, with a value of 0 meaning the less-specific per-server interval is used instead. This lets an admin override the check frequency for just one port when that particular service needs tighter or looser monitoring than the server's other ports, falling back to the server-wide interval otherwise. An admin might tighten this object just for a port running a critical payment service while leaving other ports on that same server at the default, less-frequent check interval.